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Abstract: Historical Evolution of a Cenozoic Basin, in Northern Cuba

Meizoso, Carlos Sosa - Ceinpet, Cuba

The basin evolution was interpreted based upon the stratigraphic sequence analyses with the determination of the erosional surfaces and their chronostratigraphic correlation among wells from the northern shore and adjacent canyons. This study was integrated with other stratigraphic elements and data obtained from previous works in the area.

The seismic stratigraphic study shows that the basin is composed by six depositional cycles and their inherent architecture is a function of the position in the basin.

It was observed the influence of the convergent cyclic movements, by the exact coincidence of the successive truncations, over the front of the thrust and the platform fold. The folding of sediments deposited after the collapse of the Cuban orogenesis was observed over and in the thrusts fronts, confirming the thesis evolved. The pattern events created the transcurrent fault systems, which were studied through the whole Cuban archipelago. It represents the main mechanism responsible for the reactivation of the ancient thrust systems.

Neotectonism has an important influence on the petroleum system with evident effects on preexisting traps, producing their destruction or preservation. The quality of seals also play an important role. New traps are observed in Cenozoic sediments, for the same reason. The hydrocarbon generation, seals and reservoirs episodes are interpreted based upon the sedimentary characteristics.

AAPG Search and Discovery Article #90933©1998 ABGP/AAPG International Conference and Exhibition, Rio de Janeiro, Brazil